You may only able to view your bills for the past six (6) months via online by logging in to unifi portal at unif.com.my. So, what I can suggest that, you may refer/request to them via Live Chat, call to 100 or reach to their social media channels > https://home.unifi.com.my/support/contact-us 👍
Hi, @wanibrisam .
You may download the past 6 months bill via unifi portal, https://unifi.com.my/personal or via myunifi app.
However to get more than past 6 months, I suggest you to directly contact to their CS > Live Chat https://unifi.com.my/support/contact-us / PM Facebook unifi / Twitter @helpmeunifi.